Answer:
1. Set the variable present_count to 0 and absent_count to 0
2. For each student in studentnames:
a. Display the name of the student
b. Take input whether the student is present or absent
c. If the student is present, increment present_count by 1
d. If the student is absent, increment absent_count by 1
3. Display the total number of present students and absent students in a suitable message:
a. "Number of present students: " + present_count
b. "Number of absent students: " + absent_count